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c.
d.
5.
Escape velocity of a body 1kg mass on a planet is 100 m/s. Gravitational potential
energy of the body at the planet is.
a. -5000 J
b. -1000 J
c. -2400 J
d. 5000 J
6.
The acceleration due to the gravity on the planet A is 9 times the acceleration due
to the gravity on the planet B. A man can jump to a height of 2 meter on the surface
of A. what is the height of jump by the same person B?
a. 2/9 m
b. 18 m
c. 6 m
d. 2/3 m
7.
The weight of a body is maximum at
a. poles.
b. equator.
c. center of earth.
d. moon.
8. If a body of mass, m is taken to the bottom of a deep mine. Then,
a. its weight decreases.
b. its mass increases.
c. its weight increases.
d. its mass decreases.
9. The gravitational potential energy of a body at a distance r from the center of
earth is U. The weight of the body at that point is
U/r b) Ur c) U/r d) U /r
2
2
10. The value of acceleration due to gravity will be half its value on the surface of the earth at
the height of
a.
